I have 16 years of experience being taught to, at a high level and succeeding at it. My GF has 5 years of experience teaching, and being totally oblivious to her performance.
She showed me her kindle recently. Proud she had read 37 books on it in 2 years. All fiction. Zero books about children or teaching. Wonders why she loses control of every classroom after about 3 months and suffers til the end of the school year.